diff --git a/stylix/palette.nix b/stylix/palette.nix
index afe12df0..ba8159a8 100644
--- a/stylix/palette.nix
+++ b/stylix/palette.nix
@@ -164,7 +164,14 @@ in
   config = {
     # This attrset can be used like a function too, see
     # https://github.com/SenchoPens/base16.nix/blob/b390e87cd404e65ab4d786666351f1292e89162a/README.md#theme-step-22
-    lib.stylix.colors = (cfg.base16.mkSchemeAttrs cfg.base16Scheme).override cfg.override;
+    #
+    # NOTE: base16Scheme is nullable. If null, we cannot pass it to mkSchemeAttrs.
+    # See https://github.com/nix-community/stylix/pull/1408
+    lib.stylix.colors =
+      if cfg.base16Scheme == null then
+        null
+      else
+        (cfg.base16.mkSchemeAttrs cfg.base16Scheme).override cfg.override;
 
     assertions = lib.mkIf cfg.enable [
       {